Re: pg_migrator and an 8.3-compatible tsvector data type

From: Bruce Momjian <bruce(at)momjian(dot)us>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: Josh Berkus <josh(at)agliodbs(dot)com>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>, Oleg Bartunov <oleg(at)sai(dot)msu(dot)su>, Teodor Sigaev <teodor(at)sigaev(dot)ru>
Subject: Re: pg_migrator and an 8.3-compatible tsvector data type
Date: 2009-05-30 17:23:50
Message-ID: 200905301723.n4UHNow28816@momjian.us
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Tom Lane wrote:
> Bruce Momjian <bruce(at)momjian(dot)us> writes:
> > I have discovered a simpler solution using ALTER TABLE and calling a
> > conversion function:
>
> > test=> CREATE TABLE tsvector_test(x tsvector);
> > CREATE TABLE
> > test=> ALTER TABLE tsvector_test ALTER COLUMN x TYPE tsvector
> > test-> USING conversion_func(x);
> > ALTER TABLE
>
> > No need for a fake data type and the required index infrastructure.
>
> I think this is basically a large-caliber foot gun. You're going to
> pretend that invalid data is valid, until the user gets around to fixing
> it?

What choice do we have? While we can mark indexes as invalid (which we
do), how do we mark a table's contents as invalid? Should we create
rules so no one can see the data and then have the ALTER TABLE script
remove the rules after it is rebuilt?

--
Bruce Momjian <bruce(at)momjian(dot)us> http://momjian.us
EnterpriseDB http://enterprisedb.com

+ If your life is a hard drive, Christ can be your backup. +

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